Improvement in mica lamp-chimneys



W. E. JOHNSON.

Mica Lamp-Chimney.

N0.163.206 .PatentedMay1 1,1875.-

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UNITED STATES PAT NT ()FFIQ WILLIAM E. JOHNSON, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN MICA LAMP-CHIMNEYS Specification forming part of LettersPatent No. 1 63,206, dated May 11,1875; application filed April 13,12575.

To all whom it may concern:

Be it known that I, WILLIAM E. JOHNSON, of Chicago, in the county ofCook and in the State of Illinois, have invented certain new and usefulImprovements in Mica Lamp-Chimneys; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings and to the. letters of referencemarked thereon, making a part of this specification.

The nature of my invention consists in the construction of a micalamp-chimney, in the manner hereinafter described, as will be moreparticularly set forth.

In the annexed drawings, making part of this specification, Figure 1represents a side view of the chimney, and Fig. 2 alongitudinal section.

1n the drawings, A represents the chimney body, made of mica as asubstitute for glass. This body may be made of either one piece of micaor of two, and either in tapering form or cylindrical, as may bedesirable. The chimney is surrounded at its top and bottom with roundmetallic bands 0 and E. These bands give shape to the chimney, and areriveted to it. Covering the seam or seams of this chimney, upon its sideor sides, are two metallic straps, D D, one portion of said strapsrunning up the outside, and the other portion up the inside. The twoportions of the strap are riveted together, and thus securely clamp andhold the mica in shape, and break the joint or joints, as the case maybe. To the lower end of this chimney is secured a metallic band, B,

which said band rests upon the burner,'below the light, so as not toobstruct it. This band may be made of mica but I prefer metal, as it ismore durable, and will serve a better purpose for holding the chimney inform.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The combination of the mica chimney A, metallic top rim E, metallicbase-rim B, band 0, and the vertical exterior and interior strips D D,connected together and to the chimney and hands by the rivets a: 00, allsubstantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand andseal this 16th day of March, A. D. 1875.

WILLIAM JOHNSON. n s.]

Witnesses FRED. KLINFIELD, Guns. P. CLEVELAND.

